US3638703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat stable polyester cord reinforced rubber structure
Assignee: FRANK J JENKINS
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Filing: 1968-01-29
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Granted: 1972-02-01
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Expires: 1988-01-29
Abstract
Abstract Polyester cord reinforced rubber structures such as pneumatic tires are protected against heat degradation by the use of an acid reaction product of a methylene donor such as hexamethylenetetramine in combination with a methylene acceptor such as resorcinol.
Inventors
- 👤 Norman G Endter
- 👤 Frank J Jenkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:12
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/04; C08J5/10; C08L; C08L21/00; C08J2321/00; Y; Y10; Y10S; Y10S156/00; Y10S156/91
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
46 words
The structure of claim 1 wherein the acid is selected from the group consisting of toluene sulfonic acid, benzene sulfonic acid, ethyl benzene sulfonic acid, a mixture of ortho, meta, and para toluene sulfonic acids, hydrochloric acid, phosphoric acid, sulfuric acid, fumaric acid, and boron trifluoride.
Claim 2
Dependent Claim
19 words
The structure of claim 2 wherein the acceptor is selected from the group consisting of resorcinol, and resorcinol diacetate.
Claim 3
Dependent Claim
25 words
The structure of claim 3 wherein the donor is the reaction product of a mixture of ortho, meta, and para toluene sulfonic acids and hexamethylenetetramine.
Claim 4
Dependent Claim
19 words
The structure of claim 4 wherein the acceptor is selected from the group consisting of resorcinol and resorcinol diacetate.
Claim 5
Dependent Claim
45 words
In a pneumatic tire including a carcass of generally toroidal shape having a plurality of plies of polyester tire cord fabric embedded in rubber, the improvement which comprises compounding the rubber with a methylene acceptor and, as a donor, an acid reaction product of hexamethylenetetramine.
Claim 6
Dependent Claim
47 words
The tire of claim 6 in which the acid is selected from the group consisting of toluene sulfonic acid, benzene sulfonic acid, ethyl benzene sulfonic acid, a mixture of ortho, meta, and para toluene sulfonic acids, hydrochloric acid, phosphoric acid, sulfuric acid, fumaric acid, and boron trifluoride.
Claim 7
Dependent Claim
20 words
The tire of claim 6 in which the acceptor is selected from the group consisting of resorcinol and resorcinol diacetate.
Claim 8
Dependent Claim
26 words
The structure of claim 3 wherein the acceptor and acid reaction product are present in a mole ratio of from the stochiometric to 1 to 6.
References Cited (Backward Citations)
FR1483340A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |